Which of the following network devices uses NAT to convert private IP addresses into public IP addre

Which of the following network devices uses NAT to convert private IP addresses into public
IP addresses?

A.
NAS

B.
Firewall

C.
Hub

D.
Bridge

Explanation:

http://superuser.com/questions/409404/why-do-we-have-nat-if-we-could-just-assign-apublic-ipaddress